GT15 Compatible Heatsink Head OS28154000 - O.S. Engine GT15HZ  [OS28154000]

GT15 Cooling Head Details

The O.S. Engine heatsink head OS28154000 serves as a finned cylinder head replacement for GT15 nitro engines where the GT15HZ head is specified. The focus here is on installation, thermal behaviour and tuning implications rather than sales claims.

Compatibility is specific to GT15-designated engines; confirm the engine code and clearances before ordering. The heatsink-style head fits onto the cylinder and uses the existing head studs; ensure proper torque on head screws and immaculate mating faces to retain sealing and steady temperature response during operation.

In tuning terms, swapping to this head will change combustion chamber temperature and cooling rates. When replacing the head, check for glow plug clearance, intake interference, and bodywork fit, and perform a warm idle and short test runs to validate settings.

Install this heatsink head as a like-for-like option on GT15 engines to keep cooling characteristics predictable during tuning sessions, and follow routine nitro engine installation and torque checks.